Service manual
35
Part name Check method and criterion Figure
Defrost thermistor
(RT61)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Measure the resistance with a tester.
Refer to 11-7. “Test point diagram and voltage”, 1. “Outdoor electronic
control P.C. board”, for the chart of thermistor.
Discharge temperature
thermistor (RT62)
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Refer to 11-7. “Test point diagram and voltage”,1. “Outdoor electronic
control P.C. board”, for the chart of thermistor.
Fin temperature
thermistor (RT64)
Compressor
Measure the resistance between terminals using a tester.
(Winding temperature: -10 °C ~ 40 °C)
Normal
GA50
GA60VA-
E1
,
E2
GA60VA-
E3
GA71VA
0.40 Ω ~ 0.49 Ω 0.86 Ω ~ 1.06 Ω 1.29 Ω ~ 1.49 Ω
Outdoor fan motor
Measure the resistance between lead wires using a tester.
(Part temperature: -10 °C ~ 40 °C)
Color of lead wire Normal
RED - BLK
13.4 Ω ~ 16.4 ΩBLK - WHT
WHT - RED
R. V. coil
Measure the resistance using a tester. (Part temperature: -10 °C ~ 40 °C)
Normal
MUZ-GA60VA
-
E3
Other models
1.32 kΩ ~ 1.62 kΩ 2.6 kΩ ~ 3.3 kΩ
Linear expansion valve
Measure the resistance using a tester. (Part temperature: -10 °C ~ 40 °C)
Color of lead wire Normal
WHT - RED
37.4 Ω ~ 53.9 Ω
RED - ORN
YLW - BRN
BRN - BLU
High pressure switch
(HPS)
MUZ-GA60VA
-
E3
MUZ-GA71VA
Pressure
3.7 ± 0.15 MPa Close
4.8 MPa Open
MUZ-GA50VA
MUZ-GA60VA
MUZ-GA71VA
11-5. TROUBLE CRITERION OF MAIN PARTS
W
U
V
WHT
RED
BLK
RED
YLW
BRN
ORN
BL
U
LEV
WHT
U
RED
WHT
BLK
V
W
(W)
(V)
(U)
0.05
0.1
+
-